package thinkingInJava.String_.regex_;

//: strings/TestRegularExpression.java
//Allows you to easily try out regular expressions.
//{Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" }
import java.util.regex.*;
import static thinkingInJava.YTool.YPrint.*;

public class TestRegularExpression {
public static void main(String[] args) {
 if(args.length < 2) {
   println("Usage:\njava TestRegularExpression " +
     "characterSequence regularExpression+");
   System.exit(0);
 }
 println("Input: \"" + args[0] + "\"");
 for(String arg : args) {
   println("Regular expression: \"" + arg + "\"");
   Pattern p = Pattern.compile(arg);
   Matcher m = p.matcher(args[0]);
   while(m.find()) {
	   println("Match \"" + m.group() + "\" at positions " +
       m.start() + "-" + (m.end() - 1));
   }
 }
}
} /* Output:
Input: "abcabcabcdefabc"
Regular expression: "abcabcabcdefabc"
Match "abcabcabcdefabc" at positions 0-14
Regular expression: "abc+"
Match "abc" at positions 0-2
Match "abc" at positions 3-5
Match "abc" at positions 6-8
Match "abc" at positions 12-14
Regular expression: "(abc)+"
Match "abcabcabc" at positions 0-8
Match "abc" at positions 12-14
Regular expression: "(abc){2,}"
Match "abcabcabc" at positions 0-8
*///:~

